var createError = require('http-errors');
var express = require('express');
var path = require('path');
var cookieParser = require('cookie-parser');
var logger = require('morgan');
const jwt = require('jsonwebtoken')

var indexRouter = require('./routes/index');
var usersRouter = require('./routes/users');
var dataRouter = require('./routes/data');

var app = express();

// view engine setup
app.set('views', path.join(__dirname, 'views'));
app.set('view engine', 'jade');

app.use(logger('dev'));
app.use(express.json());
app.use(express.urlencoded({ extended: false }));
app.use(cookieParser());
app.use(express.static(path.join(__dirname, 'public')));

// app.all('*', (req, res, next) => {
//   res.header('Access-Control-Allow-Origin', '*')
//   res.header('Access-Control-Allow-Headers', 'X-Requested-With,Content-Type')
//   res.header('Access-Control-Allow-Methods','PUT,POST,GET,DELETE,OPTIONS')
//   next()
// })

const whiteListUrl = {
	get: [
	],
	post: [
		'/index/login',
	]
}

const hasOneOf = (str, arr) => {
	return arr.some(item => item.includes(str))
}

app.all('*', (req, res, next) => {
	let method = req.method.toLowerCase()
	let path = req.path
	if(whiteListUrl[method] && hasOneOf(path, whiteListUrl[method])) next()
	else {
		const token = req.headers.authorization
		if (!token) res.status(401).send('there is no token, please login')
		else {
			jwt.verify(token, 'abcd', (error, decode) => {
				if (error) res.send({
					code: 401,
					mes: 'token error',
					data: {}
				})
				else {
					req.userName = decode.name
					next()
				}
			})
		}
	}
})

app.use('/index', indexRouter);
app.use('/users', usersRouter);
app.use('/data', dataRouter);

// catch 404 and forward to error handler
app.use(function(req, res, next) {
	next(createError(404));
});

// error handler
app.use(function(err, req, res, next) {
	// set locals, only providing error in development
	res.locals.message = err.message;
	res.locals.error = req.app.get('env') === 'development' ? err : {};

	// render the error page
	res.status(err.status || 500);
	res.render('error');
});

module.exports = app;
